Features in PRO version : 1. No limitation of capturing NMEA sentences2. NMEA sentence filter3. No advertisement4. Support Dropbox file uploading using built-in Dropbox engine

*** The NMEA logging function does not work on some phones. Please test your phone with the NMEA tools before you buy the PRO version

Permission* Modify/delete SD card contents is used to write NMEA file to SD card* Internet access is used for ad and Google Map* Prevent phone from sleeping is used to keep the screen on for user taking lap

How to use the app ?Press top left "GPS" icon to enable GPS.Press "Log" button to start logging NMEA data. To stop logging, press the "Log" button againPress "Save" icon to save the logging data to NMEA file

Note :1. For those who need support please email to the designated email.Do NOT use either the feedback area to write questions, it is not appropriate and that is not guaranteed that can read them.2. If you like this app, please purchase the PRO version.https://play.google.com/store/apps/details?id=com.peterhohsy.nmeatoolspro